Smog – 2 Types
- Photochemical Smog (Also called Los Angeles Smog)
- Sulfurous smog (Also called London Smog)
What are 2 main causes of smog?
The main causes of smog
Smog is formed by mixing air with pollutants and exhaust gases resulting from human activities. The factors which are responsible for this include factories, an increasing number of cars, burning coal, wood and other solid fuels in stoves.
What is smog What are the two types?
At least two distinct types of smog are recognized: sulfurous smog and photochemical smog. Sulfurous smog, which is also called “London smog,” results from a high concentration of sulfur oxides in the air and is caused by the use of sulfur-bearing fossil fuels, particularly coal.
What are the 2 main types of air pollution?
Types of air pollution. The most common and harmful pollutants outdoors include: particulate matter. nitrogen dioxide.
What is the most common type of smog?
Today, most of the smog we see is photochemical smog. Photochemical smog is produced when sunlight reacts with nitrogen oxides and at least one volatile organic compound (VOC) in the atmosphere. Nitrogen oxides come from car exhaust, coal power plants, and factory emissions.
What are 3 sources of smog?
Types of Sources
mobile sources – such as cars, buses, planes, trucks, and trains. stationary sources – such as power plants, oil refineries, industrial facilities, and factories. area sources – such as agricultural areas, cities, and wood burning fireplaces.
What is smog made from?
Smog, formed mainly above urban centres, is composed mainly of tropospheric ozone (O3); primary particulate matter such as pollen and dust; and secondary particulate matter such as sulphur oxides, volatile organic compounds, nitrogen oxides (NOx) and ammonia gas.
What is the difference between London smog and LA smog?
The London-smog mostly occurring in the winter months consists of a mixture of gaseous and solid aerosoles as well as of natural fog. The Los Angeles-smog, which is relatively dry, is formed only during sunny sommerdays by photo chemical process.
What is smog and photochemical smog?
What is photochemical smog? Photochemical smog is a mixture of pollutants that are formed when nitrogen oxides and volatile organic compounds (VOCs) react to sunlight, creating a brown haze above cities. It tends to occur more often in summer, because that is when we have the most sunlight. Primary pollutants.
Why is photochemical smog called LA smog?
Photochemical smog: This type of smog was observed in Los Angeles(1940s) and hence named as Los Angeles smog. It is formed when the air contains NO 2 and hydrocarbons and the mixture is exposed to sunlight. As the reaction take place in the presence of light to form the smog, it is called photochemical smog.
What are the 3 types of air?
Gases. The most abundant naturally occurring gas is nitrogen (N2), which makes up about 78% of air. Oxygen (O2) is the second most abundant gas at about 21%. The inert gas argon (Ar) is the third most abundant gas at 0.93%.
What are the 3 main types of air pollution?
Types of Air Pollutants
- Carbon oxides are released when fossil fuels burn.
- Nitrogen oxides form when nitrogen and oxygen combine at high temperatures.
- Sulfur oxides are produced when sulfur and oxygen combine.
- Toxic heavy metals include mercury and lead.
What are 2 secondary pollutants?
Examples of a secondary pollutant include ozone, which is formed when hydrocarbons (HC) and nitrogen oxides (NOx) combine in the presence of sunlight; NO2, which is formed as NO combines with oxygen in the air; and acid rain, which is formed when sulfur dioxide or nitrogen oxides react with water.
Which smog is more harmful?
Sulfurous smog (London smog)
The polluting particles mix with the cold air to form a thick fog that significantly worsens overall air quality.
What are the differences between photochemical smog and sulphurous smog?
Sulfurous smog, also known as London smog, develops due to high concentration of sulfur oxides in the air. Photochemical smog is produced when sunlight reacts with oxides of nitrogen and at least one volatile organic compound (VOC) in the atmosphere.
What type of air pollution is smog?
The term “smog” was first used around 1950 to describe the combination of smoke and fog in London. Today, it refers to a mixture of pollutants made up mostly of ground level ozone.
What is smog short answer 8?
Smog: This is a thick fog-like layer in the atmosphere, especially during winters, made up of fog and smoke. Sulphur dioxide is mainly produced by burning fuels such as coal. It causes respiratory problems, including permanent lung damage.
What is difference between smoke and smog?
But, Smog – Smog is Smoke + Fog.
What is the difference between fog and smog?
| Fog | Smog |
|---|---|
| Fog is caused by water droplets in the air | Smog is made up of Smoke and Fog |
What is smog give its types and effects?
Smog is a photochemical haze caused by the action of solar ultra violet radiation on atmosphere polluted with primary pollutants such as hydrocarbons and oxides of nitrogen from automobile exhaust. It reduces visibility and is highly suffocating and toxic to humans, animals and plants.
Who created smog?
Arie Haagen-Smit
Arie Haagen-Smit discovered the nature and causes of photochemical smog. He made the discovery while on a one-year leave of absence from Caltech, where he was a bioorganic chemistry professor.
Is smog a gas or liquid?
Volcanic smog (known as vog) is a mixture of atmospheric gases, volcanic gases, and suspended liquid and solid particles.